Revels riotously or causes disruption (8)

I believe the answer is:

carouses

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'revels riotously' is the definition.
'carouses' can be an answer for 'revels' (carousing is a kind of revelling). I am not sure about the 'riotously' bit.

'or causes disruption' is the wordplay.
'disruption' indicates an anagram.
'or'+'causes'='orcauses'
'orcauses' with letters rearranged gives 'CAROUSES'.

Can you help me to learn more?

(Other definitions for carouses that I've seen before include "Engages in boisterous, drunken merrymaking" , "as eight [REVELLER] does" .)

I've seen this clue in the Evening Standard.

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